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kill-the-BKL/reiserfs: release the write lock inside reiserfs_read_bitmap_block() 

reiserfs_read_bitmap_block() uses sb_bread() to read the bitmap block. This
helper might sleep.

Then, when the bkl was used, it was released at this point. We can then
relax the write lock too here.

[ Impact: release the reiserfs write lock when it is not needed ]

Cc: Jeff Mahoney <jeffm@suse.com>
Cc: Chris Mason <chris.mason@oracle.com>
Cc: Alexander Beregalov <a.beregalov@gmail.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
This commit is contained in:
Frederic Weisbecker 2009-05-01 01:44:57 +02:00
parent 148d3504c1
commit 4c5eface5d
1 changed files with 2 additions and 0 deletions
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2
fs/reiserfs/bitmap.c
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@ -1249,7 +1249,9 @@ struct buffer_head *reiserfs_read_bitmap_block(struct super_block *sb,
else if (bitmap == 0) else if (bitmap == 0)
block = (REISERFS_DISK_OFFSET_IN_BYTES >> sb->s_blocksize_bits) + 1; block = (REISERFS_DISK_OFFSET_IN_BYTES >> sb->s_blocksize_bits) + 1;
reiserfs_write_unlock(sb);
bh = sb_bread(sb, block); bh = sb_bread(sb, block);
reiserfs_write_lock(sb);
if (bh == NULL) if (bh == NULL)
reiserfs_warning(sb, "sh-2029: %s: bitmap block (#%u) " reiserfs_warning(sb, "sh-2029: %s: bitmap block (#%u) "
"reading failed", __func__, block); "reading failed", __func__, block);